Split My Computer Screen In Two My Computer Screen Splits In Two Whenever I Try To Play This Game I Installed?

My computer screen splits in two whenever i try to play this game i installed? - split my computer screen in two

I bought a computer game for my little sister, Shrek, and I installed. I turned on the computer and click on the play button and the screen is divided into two parts, one half of the screen on one side and the dark room and a smaller portion of the screen on the other side. I do not know what went wrong, not the team that only a few years. 3 cups. I do not know what happened. I installed and uninstalled the game several times, and the same. HELP!

Thank you girls:)